Photographic camera having an automatic exposure control

US4293204A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Karl Wagner · Munich, DE
• Dieter Engelsmann · Unterhaching, DE
• Hubert Hackenberg · Munich, DE
• Peter Stiefel · Ditzingen, DE

Key dates

• Filing date: Jan 30, 1980
• Grant date: Oct 6, 1981
• Expiry date: Jan 30, 2000

Classification

• Technology area (CPC G): Physics
• CPC primary: G03B7/08
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The control mechanism for a photographic camera using film carrtridges having coded marks indicative of the sensitivity of the employed film includes a hand-operated control member for setting at least one exposure parameter, an axially movable objective for setting the distance, an adjustable diaphragm, a scanner movable against the marks on the cartridge for displacing the control member in response to the coded marks, a stationary cam surface engaging the objective, transmission gears coupled between the control member and the objective to axially displace the latter according to a distance setting and according to the shape of the stationary cam and curves provided on the control member to display at least the applicable exposure range and the flash distance limits for the employed film sensitivity.